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Strasding M, Marchand L, Merino E, Zarauz C, Pitta J. Material and abutment selection for CAD/CAM implant-supported fixed dental prostheses in partially edentulous patients - A narrative review. Clin Oral Implants Res 2024. [PMID: 38864592 DOI: 10.1111/clr.14315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 05/15/2024] [Accepted: 05/27/2024] [Indexed: 06/13/2024]
Abstract
Restorative material selection has become increasingly challenging due to the speed of new developments in the field of dental material science. The present narrative review gives an overview of the current indications for implant abutments and restoration materials for provisional and definitive implant-supported fixed dental prostheses in partially edentulous patients. For single implant restorations, titanium base abutments for crowns are suggested as an alternative to the conventional stock- and customized abutments made out of metal or zirconia. They combine the mechanical stability of a metallic connection with the esthetic potential of ceramics. For multiple-unit restorations, conical titanium bases especially designed for bridges are recommended, to compensate for deviating implant insertion axes and angulations. Even though titanium base abutments with different geometries and heights are available, certain clinical scenarios still benefit from customized titanium abutments. Indications for the definitive material in fixed implant restorations depend on the region of tooth replacement. In the posterior (not esthetically critical) zone, ceramics such as zirconia (3-5-Ymol%) and lithium-disilicate are recommended to be used in a monolithic fashion. In the anterior sector, ceramic restorations may be buccally micro-veneered for an optimal esthetic appearance. Lithium-disilicate is only recommended for single-crowns, while zirconia (3-5-Ymol%) is also recommended for multiple-unit and cantilever restorations. Attention must be given to the specific mechanical properties of different types of zirconia, as some feature reduced mechanical strengths and are therefore not indicated for all regions and restoration span lengths. Metal-ceramics remain an option, especially for cantilever restorations.
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Affiliation(s)
- Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Laurent Marchand
- Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, Massachusetts, USA
| | - Elizabeth Merino
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Cristina Zarauz
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - João Pitta
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
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Daher R, Ardu S, di Bella E, Krejci I, Duc O. Efficiency of 3D printed composite resin restorations compared with subtractive materials: Evaluation of fatigue behavior, cost, and time of production. J Prosthet Dent 2024; 131:943-950. [PMID: 36333176 DOI: 10.1016/j.prosdent.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 08/03/2022] [Accepted: 08/08/2022] [Indexed: 11/05/2022]
Abstract
STATEMENT OF PROBLEM Three-dimensionally (3D)-printed composite resins have been marketed as materials for definitive restorations. However, limited information is available regarding the stability of the adhesive interface and the efficiency of 3D printed composite resins. PURPOSE The purpose of this in vitro study was to evaluate the integrity of the marginal adhesive interface before and after thermal and mechanical fatigue of an initial formulation of a 3D printed composite resin and to evaluate the efficiency of this manufacturing method. MATERIAL AND METHODS Freshly extracted molars were prepared for onlays and adhesively restored with either 3D printed composite resin (VarseoSmile Crown Plus) (Group 3D), milled composite resin (Tetric CAD) (Group MCOMP), milled PMMA (Telio CAD) (Group PMMA), and milled lithium disilicate (IPS e.max CAD) (Group EM). Marginal analysis was performed under a scanning electron microscope before and after fatigue by thermomechanical cyclic loading, and initial and terminal percentages of continuous margin (%CM) were compared. The time required for the production of each type of restoration was recorded, and the production costs were also compared. RESULTS Before aging, 3D, MCOMP, and EM presented comparable values of %CM (69.8%, 75.9%, and 63.1%, respectively) that were statistically significantly higher (P<.05) than those of PMMA (45.1%). After aging, 3D and EM had comparable results (44.7% and 43.7%, respectively), which were lower than those of the MCOMP group (68.5%) but higher than those of the PMMA group (20.5%). Regarding time efficiency, 3D printing took less time than MCOMP or PMMA if more than 8 restorations were fabricated. For the production costs, 3D printing was 5.5, 8.7, and 10.2 times less expensive than PMMA, MCOMP, and EM, respectively. The initial equipment cost was also lower for the additive manufacturing method. However, 3D printing did not always considerably reduce waste. CONCLUSIONS In terms of marginal adaptation, the evaluated initial formulation of a 3D printed composite resin behaved similarly to other well-established definitive restoration materials and better than milled PMMA, both before and after fatigue. Three-dimensionally printed resins present advantages in terms of equipment and consumable costs, even for a single restoration, but also for production time when more than 8 restorations were fabricated.
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Affiliation(s)
- René Daher
- Lecturer, Division of Cariology and Endodontology, Clinique Universitaire de Médecine Dentaire (CUMD), University of Geneva, Geneva, Switzerland.
| | - Stefano Ardu
- Senior Lecturer, Treatment Plan Unit and Division of Cariology and Endodontology, Clinique Universitaire de Médecine Dentaire (CUMD), University of Geneva, Geneva, Switzerland
| | - Enrico di Bella
- Assistant Professor, Department of Political Science, University of Genoa, Genoa, Italy
| | - Ivo Krejci
- Full Professor and Chairman, Division of Cariology and Endodontology, Clinique Universitaire de Médecine Dentaire (CUMD), University of Geneva, Geneva, Switzerland
| | - Olivier Duc
- Senior Lecturer, Division of Cariology and Endodontology, Clinique Universitaire de Médecine Dentaire (CUMD), University of Geneva, Geneva, Switzerland
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da Rosa LS, Pilecco RO, Soares PM, Rippe MP, Pereira GKR, Valandro LF, Kleverlaan CJ, Feilzer AJ, Tribst JPM. Repair protocols for indirect monolithic restorations: a literature review. PeerJ 2024; 12:e16942. [PMID: 38406292 PMCID: PMC10893862 DOI: 10.7717/peerj.16942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 01/23/2024] [Indexed: 02/27/2024] Open
Abstract
Despite the advancements in indirect monolithic restorations, technical complications may occur during function. To overcome this issues, intraoral repair using resin composite is a practical and low-cost procedure, being able to increase the restoration's longevity. This review aimed to evaluate the need for repair and suggest a standardized repair protocol to the main indirect restorative materials. For this, studies were surveyed from PubMed with no language or date restriction, to investigate the scientific evidence of indirect monolithic restoration repair with direct resin composite. A classification to guide clinical decisions was made based on the FDI World Dental Federation criteria about defective indirect restorations considering esthetic and functional standards, along with the patient's view, to decide when polishing, repairing or replacing a defective restoration. Based on 38 surveyed studies, different resin composite intraoral repair protocols, that included mechanical and chemical aspects, were defined depending on the substrate considering resin-based, glass-ceramic or zirconia restorations. The presented criteria and protocols were developed to guide the clinician's decision-making process regarding defective indirect monolithic restorations, prolonging longevity and increasing clinical success.
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Affiliation(s)
| | | | | | | | | | | | - Cornelis Johannes Kleverlaan
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - Albert J. Feilzer
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - João Paulo Mendes Tribst
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
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Ko JW, Sakong J, Kang S. Cytotoxicity of dental self-curing resin for a temporary crown: an in vitro study. JOURNAL OF YEUNGNAM MEDICAL SCIENCE 2023; 40:S1-S8. [PMID: 37098682 DOI: 10.12701/jyms.2023.00080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 03/31/2023] [Indexed: 04/27/2023]
Abstract
BACKGROUND Residual monomer tests using high-performance liquid chromatography and cytotoxicity tests were performed to analyze the effect on the oral mucosa of a self-curing resin for provisional crown production. METHODS A cytotoxicity test was performed to confirm whether leaked residual monomers directly affected oral mucosal cells. The cytotoxicity of the liquid and solid resin polymers was measured using a water-soluble tetrazolium (WST) test and microplate reader. RESULTS In the WST assay using a microplate reader, 73.4% of the cells survived at a concentration of 0.2% liquid resin polymer. The cytotoxicity of the liquid resin polymer was low at ≤0.2%. For the solid resins, when 100% of the eluate was used from each specimen, the average cell viability was 91.3% for the solid resin polymer and 100% for the hand-mixed self-curing resin, which is higher than the cell viability standard of 70%. The cytotoxicity of the solid resin polymer was low. CONCLUSION Because the polymerization process of the self-curing resin may have harmful effects on the oral mucosa during the second and third stages, the solid resin should be manufactured indirectly using a dental model.
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Affiliation(s)
- Jae-Wan Ko
- Department of Dental Technology, Daegu Health College, Daegu, Korea
- Department of Public Health, Graduate School of Environment and Public Health Studies, Yeungnam University, Daegu, Korea
| | - Joon Sakong
- Department of Occupational and Environmental Medicine, Yeungnam University Hospital, Daegu, Korea
- Department of Preventive Medicine and Public Health, Yeungnam University College of Medicine, Daegu, Korea
| | - Sohee Kang
- Department of Dentistry, Yeungnam University College of Medicine, Daegu, Korea
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Erbulak Z, Ergun G. The effects of different surface treatments applied to milled PMMA denture base material on repair bond strength. Odontology 2023; 111:953-970. [PMID: 37016128 DOI: 10.1007/s10266-023-00806-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/14/2023] [Indexed: 04/06/2023]
Abstract
The high cost of CAD/CAM systems and materials is a severe economic burden. Therefore, repair of CAD/CAM PMMA, selecting appropriate repair materials, and surface modifications are clinically important. This study aims to evaluate the shear bond strength of PMMA repair materials after various surface treatments on CAD/CAM PMMA denture base material. For this purpose, a total of 480 CAD/CAM PMMA denture base test specimens were manufactured. Then all test specimens were divided into 6 groups, and different surface treatments were applied. Group A: sandblasting, Group B: 4% hydro fluoric acid, Group C: tungsten carbide bur, Group D: dichloromethane + methyl methacrylate mixture, Group E: dichloromethane and methyl methacrylate, Group F: no surface treatment. Each group is then divided into 4 different subcategories; repair processes were performed using; heat-cured acrylic resin (n:20), auto-polymerized acrylic resin (n:20), gingiva composite (n:20), and CAD/CAM PMMA tooth material (n:20). After repairs, thermal aging was applied to half of the test specimens in each subcategory. The shear bond strength value was measured with a universal test device. Sandblasting group showed the highest surface roughness value in all test specimens (p < 0.001). Heat-cured acrylic resin with sandblasting exhibited the highest bond strength, while the untreated gingiva composite resin exhibited the lowest value. Thermal aging decreased bond strength in all repair materials (p < 0.001). Among the surface treatment groups, sandblasting with Al2O3 particles exhibited the highest surface roughness value and repair bond strength. The application of organic solvents to the surface increased the surface roughness and repair bond strength. Applying dichloromethane and methyl methacrylate monomer separately is more effective than applying it as a mixture. The ideal bonding among repair materials was obtained with heat-cured acrylic resin.
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Affiliation(s)
- Zahıde Erbulak
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Bişkek Cad. 1.Sk. No:4 06490 Emek, Ankara, Turkey.
| | - Gulfem Ergun
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Bişkek Cad. 1.Sk. No:4 06490 Emek, Ankara, Turkey
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Effect of Anti-COVID-19 Mouthwashes on Shear Bond Strength of Resin-Matrix Ceramics Repaired with Resin Composite Using Universal Adhesive: An In Vitro Study. J Funct Biomater 2023; 14:jfb14030158. [PMID: 36976082 PMCID: PMC10052296 DOI: 10.3390/jfb14030158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Using anti-COVID-19 mouthwashes has become necessary to reduce acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmissions. Resin-matrix ceramic (RMCs) materials that are exposed to mouthwashes may affect the bonding of repaired materials. This research was performed to assess the effects of anti-COVID-19 mouthwashes on the shear bond strengths (SBS) of RMCs repaired with resin composites. A total of 189 rectangular specimens of two different RMCs (Vita Enamic (VE) and Shofu Block HC (ShB)) were thermocycled and randomly divided into nine subgroups according to different mouthwashes (distilled water (DW), 0.2% povidone–iodine (PVP-I), and 1.5% hydrogen peroxide (HP)) and surface treatment protocols (no surface treatment, hydrofluoric acid etching (HF), and sandblasting (SB)). A repair protocol for RMCs was performed (using universal adhesives and resin composites), and the specimens were assessed using an SBS test. The failure mode was examined using a stereomicroscope. The SBS data were evaluated using a three-way ANOVA and a Tukey post hoc test. The SBS were significantly affected by the RMCs, mouthwashes, and surface treatment protocols. Both surface treatment protocols (HF and SB) for both RMCs, whether immersed in anti-COVID-19 mouthwash or not, improved the SBS. For the VE immersed in HP and PVP-I, the HF surface treatment had the highest SBS. For the ShB immersed in HP and PVP-I, the SB surface treatment had the highest SBS.
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SCHRADER P, SCHMIDT A, SCHLENZ MA, KOLLING S, WÖSTMANN B, BERLINGER M. A statistical model of the rate-dependent fracture behavior of dental polymer-based biomaterials. Dent Mater J 2023; 42:177-186. [PMID: 36464291 DOI: 10.4012/dmj.2022-163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
An insight into the fracture behavior of dental polymer-based biomaterials is important to reduce safety hazards for patients. The crack-driven fracture process of polymers is largely stochastic and often dependent on the loading rate. Therefore, in this study, a statistical model was developed based on three-point bending tests on dental polymethyl methacrylate at different loading rates. The fracture strains were investigated (two-parameter Weibull distribution (2PW)) and the rate-dependency of the 2PW parameters were examined (Cramér-von Mises test (CvM)), arriving at the conclusion that there could be a limiting distribution for both quasi-static and dynamic failure. Based on these findings, a phenomenological model based on exponential functions was developed, which would further facilitate the determination of the failure probability of the material at a certain strain with a given strain rate. The model can be integrated into finite element solvers to consider the stochastic fracture behavior in simulations.
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Affiliation(s)
- Peer SCHRADER
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | - Alexander SCHMIDT
- Department of Prosthodontics, Dental Clinic, Justus Liebig University Giessen
| | | | - Stefan KOLLING
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | - Bernd WÖSTMANN
- Department of Prosthodontics, Dental Clinic, Justus Liebig University Giessen
| | - Marcel BERLINGER
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
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Arkoy S, Ulusoy M. Effect of Different Surface Treatments on Repair Bond Strength of CAD/CAM Resin-Matrix Ceramics. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6314. [PMID: 36143627 PMCID: PMC9505560 DOI: 10.3390/ma15186314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/01/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
The purpose of this study was to investigate the influence of different surface treatment methods on the micro-tensile bond strength (μTBS) of resin-matrix ceramic (RMC) blocks repaired with resin composite. Three different prefabricated RMC blocks including Lava Ultimate (LU), Grandio Blocs (GB), and Shofu Block HC (HC) were thermo-cycled and divided into five surface treatment groups: Control (C), bur grinding (G), airborne particle abrasion (APA), Er,Cr:YSGG laser irritation (LI), and APA combined with LI (APA+LI). After surface treatments, topographic alterations were examined by scanning electron microscopy. Then, Universal Adhesive (Single Bond Universal) was applied and repair was simulated with nanohybrid composite (Grandio SO). Bonded specimens were cut into 1 mm2 sized beams (n = 16) and a μTBS test was conducted by using a universal test machine. Fracture types were evaluated by using a stereomicroscope. The bond- strength data was evaluated by two-way ANOVA and Tukey post-hoc test (α = 0.05). The μTBS values were significantly affected by the surface treatment variable and the interaction terms of the variables (p ≤ 0.001). However, no significant effect of RMC type was detected (p > 0.05). Among all materials, GBAPA+LI indicated the highest µTBS value. Except for the GBC, all surface treatments showed clinically acceptable bond-strength values. However, the surface treatments applied to GB and LU before the repair processes increased the repair bond-strength values while causing a negative effect for HC. In addition, LI and APA+LI can be applied as an alternative route compared to other procedures recommended by the manufacturer for surface preparation in intraoral RMC repair.
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Hadilou M, Dolatabadi A, Ghojazadeh M, Hosseinifard H, Alizadeh Oskuee P, Pournaghi Azar F. Effect of Different Surface Treatments on the Long-Term Repair Bond Strength of Aged Methacrylate-Based Resin Composite Restorations: A Systematic Review and Network Meta-analysis. BIOMED RESEARCH INTERNATIONAL 2022; 2022:7708643. [PMID: 37964860 PMCID: PMC10643039 DOI: 10.1155/2022/7708643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/28/2022] [Accepted: 08/13/2022] [Indexed: 11/16/2023]
Abstract
This systematic review and network meta-analysis is aimed at investigating the effect of common surface treatments on the long-term repair bond strength of aged resin composite restorations and to rank and compare these surface treatments. In vitro studies evaluating the methacrylate-based resin composites subjected to rigorous aging protocols before and after being repaired with a new composite were included. A frequentist network meta-analysis was carried out using a random effects model. P scores were used to rank the efficacy of the surface treatments. Also, the global and node-split inconsistencies were evaluated. Web of Science, PubMed/Medline, Scopus, and Embase databases were searched until July 07, 2022. Twenty-six studies were included in the meta-analysis. The results showed that the application of silane and a total-etch (shear MD 32.35 MPa, 95% CI: 18.25 to 46.40, P score 0.95; tensile MD 33.25 MPa, 95% CI: 25.07 to 41.44; P score 0.77) or a self-etch (shear MD 38.87 MPa, 95% CI: 21.60 to 56.14, P score 0.99; tensile MD 32.52 MPa, 95% CI: 23.74 to 41.29; P score 0.73) adhesion protocol subsequent to the roughening with diamond bur produced the highest (micro)tensile and (micro)shear bond strengths compared to diamond bur alone as the control group. There was no difference between self- and total-etch adhesive protocols. Mechanical surface treatments yielded greater bond strength when used alongside the chemical adhesive agents. Further, it is possible to achieve acceptable repair bond strength using common dental clinic equipment. Therefore, clinicians could consider repairing old resin composites rather than replacing them.
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Affiliation(s)
- Mahdi Hadilou
- Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amirmohammad Dolatabadi
- Department of Periodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Morteza Ghojazadeh
- Research Center for Evidence-Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Hosseinifard
- Research Center for Evidence-Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parnian Alizadeh Oskuee
- Department of Restorative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Pournaghi Azar
- Department of Restorative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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Punset M, Brizuela A, Pérez-Pevida E, Herrero-Climent M, Manero JM, Gil J. Mechanical Characterization of Dental Prostheses Manufactured with PMMA-Graphene Composites. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15155391. [PMID: 35955326 PMCID: PMC9369515 DOI: 10.3390/ma15155391] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/28/2022] [Accepted: 08/02/2022] [Indexed: 06/12/2023]
Abstract
The use of a PMMA composite with graphene is being commercialized for application as dental prostheses. The different proportions of fibers provide a wide range of colors that favors dental esthetics in prostheses. However, there are no studies that have explained the influence that graphene has on the mechanical properties. In this contribution, we studied the PMMA and PMMA material with graphene fibers (PMMA-G) in the form of discs as supplied for machining. The presence of graphene fibers has been studied by Raman spectroscopy and the Shore hardness and Vickers micro hardness were determined. Mechanical compression tests were carried out to obtain the values of maximum strength and Young’s modulus (E) and by means of pin-on-disc wear tests, the specific wear rate and the friction coefficients were determined following the established international standards. Finally, the samples were characterized by field emission scanning electron microscopy (FESEM) to characterize the graphene’s morphology inside the PMMA. The results showed the presence of graphene in PMMA and was estimated in an amount of 0.1027% by weight in G-PMMA. The Shore hardness and Vickers microhardness values did not show statistically significant differences. Differences were observed in the compression maximum strength (129.43 MPa for PMMA and 140.23 for PMMA-G) and E values (2.01 for PMMA and 2.89 GPa for PMMA-G) as well as in the lower wear rate for the G-PMMA samples (1.93 × 10−7 for PMMA and 1.33 × 10−7 mm3/N·m) with a p < 0.005. The coefficients of friction for PMMA-G decreased from 0.4032 for PMMA to 0.4001 for PMMA-G. From the results obtained, a slight content in graphene produced a significant improvement in the mechanical properties that could be observed in the prosthesis material. Therefore, we can state that the main attraction of this material for dental prosthesis is its esthetics.
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Affiliation(s)
- Miquel Punset
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Av. Eduard Maristany 16, 08019 Barcelona, Spain
- Barcelona Research Center in Multiscale Science and Engineering, Technical University of Catalonia (UPC), Av. Eduard Maristany 10-14, 08019 Barcelona, Spain
- UPC Innovation and Technology Center (CIT-UPC), Technical University of Catalonia (UPC), C. Jordi Girona 3-1, 08034 Barcelona, Spain
| | - Aritza Brizuela
- Facultad de Odontología, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2., 47012 Valladolid, Spain
| | - Esteban Pérez-Pevida
- Facultad de Odontología, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2., 47012 Valladolid, Spain
| | | | - José Maria Manero
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Av. Eduard Maristany 16, 08019 Barcelona, Spain
- Barcelona Research Center in Multiscale Science and Engineering, Technical University of Catalonia (UPC), Av. Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Javier Gil
- Bioengineering Institute of Technology, International University of Catalonia, Josep Trueta s/n., 08195 Barcelona, Spain
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Physical-chemical and microbiological performances of graphene-doped PMMA for CAD/CAM applications before and after accelerated aging protocols. Dent Mater 2022; 38:1470-1481. [PMID: 35810033 DOI: 10.1016/j.dental.2022.06.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/07/2022] [Accepted: 06/22/2022] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Innovative, nanotechnologies-featuring dental materials for CAD/CAM applications are becoming available. However, the interaction with the oral environment poses critical challenges to their longevity. The present study evaluated specific physical-chemical properties and antimicrobial potential of a CAD/CAM graphene-doped resin before and after accelerated aging protocols. METHODS Graphene nanofibers (GNF)-doped (<50 ppm) PMMA (GPMMA) and control PMMA CAD/CAM discs were used. Specimens underwent aging procedures of their bulk (thermo- and load-cycling) and surface (24 h-immersion in absolute ethanol), then they were tested for flexural strength, ultimate tensile strength, sorption/solubility, and methyl-methacrylate elution. Surface characterization included x-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, surface roughness, microhardness, and scanning electron microscopy (SEM). Adherence of Streptococcus mutans and Candida albicans, and biofilm formation (continuous-flow bioreactor) by the same strains and an artificial oral microcosm were investigated. RESULTS GNF-doping improved the physical-chemical bulk properties of the PMMA resin. Surface aging reduced microhardness and increased the roughness of both test and control materials. Surfaces displayed signs of swelling and degradation at SEM. Microbiological data of non-aged surfaces showed that GNF-doping significantly reduced biofilm formation by all tested strains despite having no impact on microbial adherence. After aging, microbial adherence was higher on GPMMA surfaces, while biofilm formation was not promoted. SIGNIFICANCE GNF-doping improved the material's performance and influenced its antimicrobial potential. This strategy seems a valuable option to overcome the effects of surface degradation induced by aging on the antimicrobial potential of PMMA resin.
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Hagino R, Mine A, Matsumoto M, Yumitate M, Ban S, Yamanaka A, Ishida M, Miura J, Meerbeek BVAN, Yatani H. Combination of a silane coupling agent and resin primer reinforces bonding effectiveness to a CAD/CAM indirect resin composite block. Dent Mater J 2021; 40:1445-1452. [PMID: 34602585 DOI: 10.4012/dmj.2021-083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effects of silanization and resin primer application on CAD/CAM indirect resin composite block bonding were investigated. KATANA AVENCIA P blocks (Kuraray Noritake Dental) were treated with a silane coupling agent and/or a resin primer. The contact angles (CAs) of resin primer were observed before and after silanization. Panavia V5 (Kuraray Noritake Dental) was built after each treatment. Bond strengths were measured, and the interface was analyzed by energy dispersive X-ray spectroscopy (EDS). The CA showed that silane treatment improved the wettability of the resin primer to the resin block. The combination treatment of the silane and resin primer showed significantly higher bond strength than no treatment, only in the silanization or resin primer group (p<0.001 each). EDS analysis showed that the resin primer penetrated both cement and block sides. The combination of the silane and resin primer improved bonding effectiveness between the resin block and resin cement.
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Affiliation(s)
- Ryosuke Hagino
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Atsushi Mine
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Mariko Matsumoto
- Department of Restorative Dentistry, Hokkaido University Graduate School of Dental Medicine.,KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry
| | - Masahiro Yumitate
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Shintaro Ban
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Azusa Yamanaka
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Masaya Ishida
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Jiro Miura
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
| | - Bart VAN Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry
| | - Hirofumi Yatani
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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Alshali RZ, Bukhary DM, AlQahtani MA, Alenazi NO, Alzahrani AH, Alobaid HA. Repair of temporary fixed dental prostheses using a flowable resin composite: Effect of material, bonding, and aging. Saudi Dent J 2021; 33:495-502. [PMID: 34803292 PMCID: PMC8589620 DOI: 10.1016/j.sdentj.2020.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 09/24/2020] [Accepted: 09/30/2020] [Indexed: 11/29/2022] Open
Abstract
Objectives Assessment of the effect of aging and bonding on the reparability of different temporary crown and bridge materials using a flowable resin composite. Methods The materials used included two bis-acryl and two polymethylmethacrylate materials. The materials were aged either dry, in distilled water, or in a 75% ethanol/water solution. Each group was divided into three subgroups (n = 6) according to the bonding method: application of a universal adhesive, application of a universal primer followed by a universal adhesive, or no bonding. Materials were repaired with a light-cure flowable resin composite; then, they were subjected to thermocycling and tested by shear bond strength. The data were analysed using three-way ANOVA, one-way ANOVA, and Tukey post hoc tests (α = 0.05). Results The shear bond strength was significantly higher for bis-acryl compared to polymethylmethacrylate materials (p < 0.001). In terms of aging conditions, shear bond strength was in the order of 75% ethanol/water solution < dry < water. The application of bonding agents significantly increased the shear bond strength of polymethylmethacrylate-based materials (p < 0.001). The difference between water and dry storage was insignificant (p = 0.558); however, storage in a 75% ethanol/water solution showed significantly lower values compared to both dry and water storage in most of experimental groups (p < 0.001). Polymethylmethacrylate-based materials mainly demonstrated adhesive failure, while bis-acryl materials predominantly showed cohesive failure. Conclusion The bond strength of a light-cure flowable resin composite is significantly higher with bis-acryl compared to that with polymethylmethacrylate-based substrates. Aging in water does not have a significant effect; however, the 75% ethanol/water solution tends to negatively affect repairability. The application of different bonding agents positively affects the repair strength, especially for polymethylmethacrylate-based substrates.
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Affiliation(s)
- Ruwaida Z Alshali
- Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Dalea M Bukhary
- Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed A AlQahtani
- Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Naflaa O Alenazi
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abeer H Alzahrani
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hayam A Alobaid
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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Repair Bond Strength of Composite Resin to Aged Resin and Glass-Matrix CAD/CAM Ceramic Materials Using Two Different Repair Systems. COATINGS 2021. [DOI: 10.3390/coatings11111331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study evaluates the repair bond strength of resin-matrix and glass-matrix CAD/CAM ceramic materials based on two repair systems. Thirty specimens measuring 2.5 mm in thickness were prepared from Crystal Ultra (CU), Vita Enamic (EN), Lava Ultimate (LU), Cerasmart (CS), and Vitablocs Mark II (VM2) materials and aged for 5000 thermal cycles. Specimens were randomly allocated into three groups: control, Monobond-S (MS) primer, and Monobond Etch & Prime (MEP). Composite resin (Tetric N Ceram) (5 mm in diameter and 2 mm thick) was packed and light-cured onto treated specimen surfaces. Subsequently, the specimens’ shear bond strength (SBS) was evaluated, and failure modes was recorded. Statistical analysis was performed using factorial ANOVA and Tukey’s post hoc tests (a = 0.05). The factorial ANOVA revealed significant interactions between the material type and repair system, which was significant (p < 0.01). The highest and lowest SBS were obtained for CU (27.09 ± 1.11) and VM2 (4.30 ± 0.59) in MS and control groups, respectively. In all the groups, CU demonstrated higher SBS, whereas VM2 demonstrated lower SBS. There were no significant differences in SBS between EN and LU, and CS and CU in all the study groups (p > 0.05). The Monobond-S repair system provided non-significantly higher SBS compared to the MEP systems, except for VM2 and LU materials. The new resin-matrix CAD/CAM material demonstrated the highest SBS compared to the other materials for both conventional and MEP repair systems. Both repair systems showed clinically acceptable bond strength and allowed for successful repair of the resin-matrix ceramic materials.
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Effect of surface treatments and flash-free adhesive on the shear bond strength of ceramic orthodontic brackets to CAD/CAM provisional materials. Clin Oral Investig 2021; 26:481-492. [PMID: 34605975 DOI: 10.1007/s00784-021-04022-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 05/31/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To evaluate the effect of surface treatments and flash-free adhesive on the shear bond strength of ceramic orthodontic brackets bonded to materials used for the fabrication of CAD/CAM provisional crowns. MATERIALS AND METHODS Specimens (n = 160) from each provisional material (CAD-Temp and C-Temp) were categorized into four groups according to the surface treatment methods: C (no surface treatment), HP (37% H3PO4), DB (mechanical roughening by diamond bur), and SB (mechanical roughening by blasting). Maxillary central incisor ceramic brackets (Clarity™ Advanced ceramic brackets, 3 M Unitek) were bonded to the conditioned provisional materials according to the used adhesive system (n = 20), APC PLUS or APC flash-free. All specimens were evaluated for shear bond strength testing (SBS) and the adhesive remnant index (ARI). Data were analyzed using Kruskal-Wallis and Mann-Whitney U tests. RESULTS C-Temp significantly recorded higher SBS than CAD-Temp (24.0 and 16.0 MPa, respectively) (p < 0.001). DB and SB groups utilizing flash-free adhesive significantly recorded higher SBS (18.2 and 24.0 MPa, respectively) (P < 0.05) compared to other groups in the tested materials. Higher ARI scores were recorded in CAD-Temp and flash-free adhesive. CONCLUSIONS Mechanical surface treatments and flash-free adhesive would enhance SBS of ceramic orthodontic brackets to CAD/CAM provisional materials. The higher ARI scores reported with CAD-Temp and flash-free adhesive reduce chair time for excess removal. CLINICAL RELEVANCE Bonding of orthodontic brackets to provisional restorations is a challenge for orthodontists in adult comprehensive cases that could be improved by an appropriate provisional material, surface treatments, and adhesive system.
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Kuscu E, Klink A, Spintzyk S, Kraemer Fernandez P, Huettig F. Bonding Interface and Repairability of 3D-Printed Intraoral Splints: Shear Bond Strength to Current Polymers, with and without Ageing. MATERIALS 2021; 14:ma14143935. [PMID: 34300854 PMCID: PMC8307865 DOI: 10.3390/ma14143935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 12/12/2022]
Abstract
This in-vitro study investigates the bonding interfaces reached by the conditioning of a splint material additively manufactured by digital light processing (AM base) as well as the shear bond strength (SBS) of resins bonded to these surfaces (repair material). Therefore, the AM base was either stored in dry for 12 h or wet environment for 14 days to simulate ageing by intraoral wear. The dry and wet group was bonded after physical and/or chemical conditioning to cylinders made from polymethylmethacrylate or four novel polymers allowing splint modifications. Blasted and methylmethacrylate (MMA)-conditioned Polymethylmethacrylate (PMMA) bonded to PMMA acted as the gold standard. The surface profiles revealed highest differences of Ra towards the gold standard in AM base conditioned with other than MMA after sandblasting. The adhesively bonded repair materials of the wet AM base were further aged in wet environment for 14 days. The SBS of the gold standard (25.2 MPa and 25.6 MPa) was only reached by PMMA bonded to blasted and MMA-conditioned AM base after dry (22.7 MPa) and non-conditioned after wet storage (23 MPa). Four repair materials failed to reach the threshold of 5 MPa after dry storage and three after wet storage, respectively. Non-conditioned AM base revealed the highest risk for adhesive fractures when using other resins than PMMA.
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Affiliation(s)
- Ebru Kuscu
- Department of Prosthodontics, University Clinic of Dentistry, Oral Medicine, and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2–8, 72076 Tübingen, Germany; (A.K.); (P.K.F.); (F.H.)
- Correspondence:
| | - Andrea Klink
- Department of Prosthodontics, University Clinic of Dentistry, Oral Medicine, and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2–8, 72076 Tübingen, Germany; (A.K.); (P.K.F.); (F.H.)
| | - Sebastian Spintzyk
- Section Medical Materials Science and Technology, Tuebingen University Hospital, Osianderstr. 2–8, 72076 Tübingen, Germany;
| | - Pablo Kraemer Fernandez
- Department of Prosthodontics, University Clinic of Dentistry, Oral Medicine, and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2–8, 72076 Tübingen, Germany; (A.K.); (P.K.F.); (F.H.)
| | - Fabian Huettig
- Department of Prosthodontics, University Clinic of Dentistry, Oral Medicine, and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2–8, 72076 Tübingen, Germany; (A.K.); (P.K.F.); (F.H.)
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Schrader P, Kolling S, Schlenz MA, Wöstmann B, Schmidt A. Finite element simulation of fixed dental prostheses made from PMMA -Part II: Material modeling and nonlinear finite element analysis. Dent Mater J 2021; 40:894-902. [PMID: 33883350 DOI: 10.4012/dmj.2020-231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Material characteristics can change significantly with increasing chewing velocity. As these in-vitro examinations are very time-consuming and cost-intensive, the application of finite element analysis (FEA) offers a suitable alternative for predicting the material behavior of complex specimen geometries under clinically relevant loads. Although FEA is applied within numerous dental investigations, there are only few studies available in which a nonlinear FEA is validated with real experiments. Therefore, the aim of the present study was to predict the mechanical behavior of a clinically close three-unit temporary bridge composed of polymethyl methacrylate (PMMA) in the left upper jaw with nonlinear FEA and to verify the prediction through validation experiments. In conclusion, simplifying assumptions of linear elastic material properties for polymeric materials should be avoided in FEA studies, because rate dependencies, stress relaxation and plastic flow are not considered. Additionally, precise preliminary investigations for material characterization are necessary.
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Affiliation(s)
- Peer Schrader
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | - Stefan Kolling
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | | | - Bernd Wöstmann
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
| | - Alexander Schmidt
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
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18
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Schmidt A, Kididane I, Schlenz MA, Wöstmann B, Kolling S, Schrader P. Finite element simulation of fixed dental prostheses made from PMMA -Part I: Experimental investigation under quasi-static loading and chewing velocities. Dent Mater J 2021; 40:704-711. [PMID: 33612565 DOI: 10.4012/dmj.2020-230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Material properties are of high clinical relevance, even though in vitro laboratory setups may differ from clinical conditions. Therefore, the aim of the present study was to investigate the fracture behavior of three-unit bridge restoration (Telio CAD) with different test velocities (1.0 mm/min International Organization for Standardization (ISO) standard speed/ 130 mm/s mean chewing velocity) and to provide crucial validation experiments for the upcoming Part 2 of our study, in which FEA on such temporary restorations will be conducted. Local strains were detected using digital image correlation (DIC). The material exhibited significantly different responses at different test velocities, and the forces at fracture were found to be much smaller at chewing velocity (130 mm/s) than in the quasi-static test. Overall, the results of the present study show that characteristics pertaining to material behavior can change significantly with increasing chewing velocity, and that fracture forces decrease with increasing test velocity.
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Affiliation(s)
- Alexander Schmidt
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
| | - Ihssane Kididane
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | | | - Bernd Wöstmann
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
| | - Stefan Kolling
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | - Peer Schrader
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
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Which surface treatment promotes higher bond strength for the repair of resin nanoceramics and polymer-infiltrated ceramics? A systematic review and meta-analysis. J Prosthet Dent 2021; 128:139-149. [PMID: 33573835 DOI: 10.1016/j.prosdent.2020.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/13/2020] [Accepted: 06/15/2020] [Indexed: 01/22/2023]
Abstract
STATEMENT OF PROBLEM Which surface treatment provides the optimal bond strength (BS) for the repair of resin nanoceramics (RNCs) and polymer-infiltrated ceramics (PICs) is unclear. PURPOSE The purpose of this systematic review and meta-analysis of in vitro studies was to determine the best surface treatment protocols for the repair of PICs and RNCs. MATERIAL AND METHODS The PubMed, Scopus, and Web of Science electronic databases were searched to select in vitro studies in English up to March 2020. Studies with fewer than 5 specimens, those that did not evaluate the BS of PICs or RNCs, and those with aging for fewer than 30 days and 5000 cycles were excluded. Data sets were extracted, and the mean differences were analyzed by using a systematic review software program. RESULTS Among 284 potentially eligible studies, 21 were selected for full-text analysis, and 9 were included in the systematic review, of which 6 were used in the meta-analysis. The meta-analyses were performed for each treatment surface versus their respective control group and their combinations according to material: RNCs and PICs. For RNCs, airborne-particle abrasion with aluminum oxide (Al2O3) treatment was statistically higher than tribochemical silica airborne-particle abrasion (CoJet) (P=.02, I2=90%) and that in the hydrofluoric acid (HF) (P<.001, I2=0%) groups and was statistically similar to diamond rotary instrument grinding (P=.40, I2=54%). For PICs, the treatment with hydrofluoric acid (HF) was statistically significantly higher than with CoJet (P=.03, I2=62%) and airborne-particle abrasion with Al2O3 (P<.001, I2=98%). CONCLUSIONS The best surface treatment protocol for repair varied according to the restorative material. HF followed by silanization is suggested for PICs, and airborne-particle abrasion with Al2O3 or preparation with a diamond rotary instrument for RNCs.
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Revilla-León M, Morillo JA, Att W, Özcan M. Chemical Composition, Knoop Hardness, Surface Roughness, and Adhesion Aspects of Additively Manufactured Dental Interim Materials. J Prosthodont 2020; 30:698-705. [PMID: 33290604 DOI: 10.1111/jopr.13302] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2020] [Indexed: 12/17/2022] Open
Abstract
PURPOSE To measure the chemical composition, Knoop hardness, surface roughness, and composite bond strength of additive manufactured (AM) and conventional interim materials. MATERIAL AND METHODS Disks were prepared using conventionally (CNV group) and additively manufactured (AM group) materials: CNV-1 (Protemp 4; 3M ESPE), CNV-2 (Anaxdent new outline dentin; Anaxdent), AM-1 (FreePrint temp; Detax), AM-2 (E-Dent 400 C&B MFH; Envisiontec), AM-3 (NextDent C&B MFH; 3D Systems), and AM-4 (Med620 VEROGlaze; Stratasys). Each group was subdivided into 3 subgroups (n = 20) for analyzing Knoop hardness (KHN), chemical composition, superficial roughness (Ra), and composite shear bond strength. The first subgroup was exposed to a microhardness test. Subsequently, EDAX analysis was selected to analyze the chemical composition. The second subgroup was selected to measure the superficial roughness (Ra) using a contact profilometer. The third subgroup was used to measured composite shear bond strength using a universal testing apparatus. A digital microscope was used to analyze the fracture mode. The Shapiro-Wilk test showed normally distributed data. One-way ANOVA and post hoc Sidak tests were selected (α = 0.05). RESULTS Major variances in chemical composition were observed among the specimens. Significant differences in Knoop hardness (p < 0.001) and surface roughness (p < 0.001) were detected. The AM-4 (13.45 ± 2.93 KHN), the CNV-2 (13.35 ± 5.84 KHN), the AM-2 (13.03 ± 3.29 KHN), and the AM-1 (12.55 ± 2.93 KHN) groups obtained the highest Knoop hardness values, followed by the AM-3 and the CNV-1 groups (p < 0.05). The AM-1 group (1.88 ± 1.11 Ra) obtained the highest surface roughness values among the groups, followed by the AM-3 group (0.90 ± 0.14 Ra) (p < 0.05). However, no significant differences in shear bond strength values were found between the groups ranging from 23.18 ± 8.88 MPa to 33.29 ± 9.17 MPa (p = 0.061). All the groups showed a cohesive mode of failure. CONCLUSIONS The AM interim materials tested had significant chemical composition variations compared to conventional materials. For the mechanical properties evaluated, the AM materials obtained appropriate mechanical properties for use as an interim dental restoration. However, further studies are required to evaluate more extensively its mechanical properties and verify their applicability in the oral cavity, clinical behavior, and biocompatibility.
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Affiliation(s)
- Marta Revilla-León
- Comprehensive Dentistry Department, College of Dentistry, Texas A&M University, Dallas, TX.,Restorative Dentistry, School of Dentistry, University of Washington, Seattle, WA.,Revilla Research Center, Madrid, Spain
| | | | - Wael Att
- Prosthodontics Department, Tufts University School of Dental Medicine, Boston, MA
| | - Mutlu Özcan
- Division of Dental Biomaterials, Clinic for Reconstructive Dentistry, Center for Dental and Oral Medicine, University of Zürich, Zürich, Switzerland
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Niizuma Y, Kobayashi M, Toyama T, Manabe A. Effect of etching with low concentration hydrofluoric acid on the bond strength of CAD/CAM resin block. Dent Mater J 2020; 39:1000-1008. [PMID: 32684610 DOI: 10.4012/dmj.2018-398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of etching for 90 s with low concentrations (0.5, 1.0, 2.0, 3.0, 3.5, and 4.0%) of hydrofluoric acid (HF) on the adhesiveness of computer-aided design/computer-aided manufacturing (CAD/CAM) resin blocks [CERASMART (CS), SHOFU BLOCK HC (HC), KATANA AVENCIA Block(KA), and VITA ENAMIC (EN)] was investigated. Energy dispersive spectroscopy revealed that the silicon content of HC, KA, and EN groups remained almost constant with HF etching of ≤4%. HF etching increased the surface roughness of all blocks. The HF concentration resulting in the highest shear bond strength in each group was as follows: CS (2.0%), HC (3.0%), KA (3.5%) and EN (0.5%). Scanning electron microscopy revealed that the bonding interface of etched surfaces differed significantly from that of airborne-particle abrasion surfaces. Thus, low concentration HF etching is effective for surface treatment of CAD/CAM resin blocks. The etching effect and optimum HF concentration differ with the block composition and structure.
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Affiliation(s)
- Yuiko Niizuma
- Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry
| | - Mikihiro Kobayashi
- Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry
| | - Toshinari Toyama
- Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry
| | - Atsufumi Manabe
- Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry
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Bond strength of three chairside crown reline materials to milled polymethyl methacrylate resin. J Prosthet Dent 2020; 125:544.e1-544.e8. [PMID: 33243474 DOI: 10.1016/j.prosdent.2020.10.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 11/22/2022]
Abstract
STATEMENT OF PROBLEM Information on the bond strength of milled polymethyl methacrylate interim restorations when relined with chairside reline materials is lacking. PURPOSE The purpose of this in vitro study was to measure the shear bond strength of various combinations of 3 different chairside reline materials bonded to milled polymethyl methacrylate blocks with 3 different types of surface treatments. MATERIALS AND METHODS Uniform blocks (10×10×22 mm) were milled from tooth-colored polymethyl methacrylate disks (Vivid PMMA; Pearson Dental Supply Co). The surface treatments tested were airborne-particle abrasion with 50-μm particle size aluminosilicate, application of acrylic resin monomer (Jet Liquid; Lang Dental Manufacturing Co) for 180 seconds, and airborne-particle abrasion with monomer application. The control groups were blocks with no surface treatment. The chairside reline materials tested were Jet acrylic resin (Jet Powder; Lang Dental Manufacturing Co), bis-acryl resin (Integrity; Dentsply Sirona), and flowable composite resin (Reveal; Bisco). All materials were applied through a Ø1.5×3-mm bonding ring. Ten specimens for each of the 12 groups were tested in a universal testing machine. Load was applied at a crosshead speed of 1 mm/min. Fracture surfaces were then analyzed for cohesive versus adhesive or mixed failure. Data were analyzed using 2-way ANOVA and Tukey-Kramer post hoc analysis (α=.05). RESULTS The mean shear bond strength values ranged from 1.77 ±0.79 MPa to 28.49 ±5.75 MPa. ANOVA revealed that reline material (P<.05), surface treatment (P<.05), and their interactions (P<.05) significantly affected the shear bond strength among the experimental groups. The strongest combination was Jet acrylic resin applied on specimens treated with airborne-particle abrasion and monomer. All 3 failure modalities (adhesive, cohesive, and mixed modes) were observed. CONCLUSIONS Of the materials tested, the most reliable material to bond to milled polymethyl methacrylate was Jet acrylic resin, and the bond strength values were increased substantially when the milled polymethyl methacrylate surface was airborne-particle abraded and monomer was applied.
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Kilinc H, Sanal FA, Turgut S. Shear bond strengths of aged and non-aged CAD/CAM materials after different surface treatments. J Adv Prosthodont 2020; 12:273-282. [PMID: 33149848 PMCID: PMC7604239 DOI: 10.4047/jap.2020.12.5.273] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 06/15/2020] [Accepted: 07/07/2020] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To assess shear bond strengths (SBS) of resin composites on aged and non-aged prosthetic materials with various surface treatments. MATERIALS AND METHODS Cerasmart (CE), Vita Enamic (VE), Vita Mark II (VM), and IPS e.max CAD (EC) blocks were sliced, and rectangular-shaped specimens (14 × 12 × 1.5 mm; N = 352) were obtained. Half of the specimens were aged (5000 thermal cycles) for each material. Non-aged and aged specimens were divided into 4 groups according to the surface treatments (control, air abrasion, etching, and laser irradiation; n = 11) and processed for scanning electron microscopy (SEM). The repair procedure was performed after the surface treatments. SBS values and failure types were determined. Obtained data were statistically analyzed (P≤.05). RESULTS The material type, surface treatment type, and their interactions were found significant with regard to SBS (P<.001). Aging also had a significant effect on prosthetic material-resin composite bonding (P<.001). SBS values of non-aged specimens ranged from 12.16 to 17.91 MPa, while SBS values of aged specimens ranged from 9.46 to 15.61 MPa. Non-aged VM in combination with acid etching presented the highest score while the control group of aged CE showed the lowest. CONCLUSION Etching was more effective in achieving durable SBS for VM and EC. Laser irradiation could be considered as an alternative surface treatment method to air abrasion for all tested materials. Aging had significant effect on SBS values generated between tested materials and resin composite.
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Affiliation(s)
- Hamiyet Kilinc
- Department of Prosthodontics, Faculty of Dentistry, Bolu Abant Izzet Baysal University, Bolu, Turkey
| | - Fatma Ayse Sanal
- Department of Prosthodontics, Faculty of Dentistry, Bolu Abant Izzet Baysal University, Bolu, Turkey
| | - Sedanur Turgut
- Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
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Schmidt A, Schrader P, Frendel K, Schlenz MA, WÖstmann B, Kolling S. Is the assumption of linear elasticity within prosthodontics valid for polymers? -An exemplary study of possible problems. Dent Mater J 2020; 40:52-60. [PMID: 32908044 DOI: 10.4012/dmj.2019-373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
As shown in previous studies within other scientific fields, the material behavior of polymethyl methacrylate (PMMA) is viscoelastic-viscoplastic. However, in dental biomaterial science it is mostly considered as linear elastic or elastic-plastic. The aim of the present study was to evaluate, whether the assumption of elastic or elastic-plastic material behavior for PMMA is a practicable simplification or a potential source of error, especially considering clinical loading conditions. Telio-CAD was tested in three-point bending tests with different test velocities to examine the material behavior at different initial loading rates. Additionally, a dynamic-mechanical-thermal-analysis at different frequencies and temperatures was used. Here, a significant influence of loading rate and temperature as well as stress relaxation and creep were observed. To describe the rate-dependency of the elastic modulus, a new model was created, from which the elastic modulus can be calculated with a given strain rate. This model was validated using linear elastic finite element analysis.
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Affiliation(s)
- Alexander Schmidt
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
| | - Peer Schrader
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
| | - Kay Frendel
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
| | | | - Bernd WÖstmann
- Department of Prosthodontics, Dental Clinic, Justus-Liebig-University
| | - Stefan Kolling
- Institute of Mechanics and Materials, Technische Hochschule Mittelhessen
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Gul P, Altınok-Uygun L. Repair bond strength of resin composite to three aged CAD/CAM blocks using different repair systems. J Adv Prosthodont 2020; 12:131-139. [PMID: 32601532 PMCID: PMC7314627 DOI: 10.4047/jap.2020.12.3.131] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 04/01/2020] [Accepted: 04/29/2020] [Indexed: 12/05/2022] Open
Abstract
PURPOSE The purpose of this study is to evaluate the repair bond strength of a nanohybrid resin composite to three CAD/CAM blocks using different intraoral ceramic repair systems. MATERIALS AND METHODS Three CAD/CAM blocks (Lava Ultimate, Cerasmart, and Vitablocks Mark II) were selected for the study. Thirty-two specimens were fabricated from each block. Specimens were randomly divided into eight groups for the following different intraoral repair systems: Group 1: control group (no treatment); Group 2: 34.5% phosphoric acid etching; Group 3: CoJet System; Group 4: Z-Prime Plus System; Group 5: GC Repair System; Group 6: Cimara System; Group 7: Porcelain Repair System; and Group 8: Clearfil Repair System. Then, nanohybrid resin composite (Tetric Evo Ceram) was packed onto treated blocks surfaces. The specimens were thermocycled before application of repair systems and after application of composite resin. After second thermal cycling, blocks were cut into bars (1 × 1 × 12 mm3) for microtensile bond strength tests. Data were analyzed using two-way ANOVA and Tukey's HSD test (α=.05). RESULTS Cimara System, Porcelain Repair, and Clearfil Repair systems significantly increased the bond strength of nanohybrid resin composite to all CAD/CAM blocks when compared with the other tested repair systems (P<.05). In terms of CAD/CAM blocks, the lowest values were observed in Vitablocks Mark II groups (P<.05). CONCLUSION All repair systems used in the study exhibited clinically acceptable bond strength and can be recommended for clinical use.
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Affiliation(s)
- Pinar Gul
- Department of Restorative Dentistry, Faculty of Dentistry, Atatürk University, Erzurum, Turkey
| | - Latife Altınok-Uygun
- Graduate Department of Restorative Dentistry, Faculty of Dentistry, Atatürk University, Erzurum, Turkey
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Hagino R, Mine A, Kawaguchi-Uemura A, Tajiri-Yamada Y, Yumitate M, Ban S, Miura J, Matsumoto M, Yatani H, Nakatani H. Adhesion procedures for CAD/CAM indirect resin composite block: A new resin primer versus a conventional silanizing agent. J Prosthodont Res 2020; 64:319-325. [PMID: 32423658 DOI: 10.1016/j.jpor.2019.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 09/09/2019] [Accepted: 09/12/2019] [Indexed: 11/24/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the effectiveness of both a resin primer containing methyl methacrylate (MMA) and a silanizing agent on bonding to indirect resin composite blocks, using two types of build-up hybrid resin composites. METHODS SHOFU BLOCK HC (Shofu) specimens were blasted with alumina, after which one of two surface treatments was applied: CERA RESIN BOND (Shofu, the Silane group) or HC primer (Shofu, the MMA group). Resin composites made using either Solidex Hardura (SDH, Shofu) or Ceramage Duo (CMD, Shofu) were built up and micro-tensile bond strength (μTBS) values were measured after storage in water for either 24h or 6 months (n=24 per group). The fracture surfaces after μTBS measurements and the resin block/build-up resin interfaces were observed by scanning electron microscopy (SEM). RESULTS The bond strength of the Silane/SDH group significantly decreased after 6 months (p<0.001), whereas in the MMA group there was no significant loss after 24h or 6 months (p=0.99). In the CMD group, the bond strength after 6 months was significantly lowered in both the Silane group (p<0.001) and the MMA group (p<0.001), but the latter still showed greater adhesion. SEM images demonstrated that the matrix resin was partially destroyed at the fracture surfaces of the MMA group and fracture surface unevenness was observed. CONCLUSIONS A primer containing MMA produced stronger bonding to CAD/CAM resin even after long-term aging compared to a silane treatment.
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Affiliation(s)
- Ryosuke Hagino
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan.
| | - Atsushi Mine
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan.
| | - Asuka Kawaguchi-Uemura
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Yuko Tajiri-Yamada
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Masahiro Yumitate
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Shintaro Ban
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Jiro Miura
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital, Japan
| | - Mariko Matsumoto
- Department of Restorative Dentistry, Hokkaido University Graduate School of Dental Medicine, Japan
| | - Hirofumi Yatani
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Hayaki Nakatani
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
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Sismanoglu S, Yildirim-Bilmez Z, Erten-Taysi A, Ercal P. Influence of different surface treatments and universal adhesives on the repair of CAD-CAM composite resins: An in vitro study. J Prosthet Dent 2020; 124:238.e1-238.e9. [PMID: 32376031 DOI: 10.1016/j.prosdent.2020.02.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 02/17/2020] [Accepted: 02/17/2020] [Indexed: 11/29/2022]
Abstract
STATEMENT OF PROBLEM The repairability of computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins might be adversely affected by the high degree of matrix polymerization that occurs during their manufacturing process. However, information on their repairability is lacking. PURPOSE The purpose of this in vitro study was to evaluate the microtensile bond strength of CAD-CAM composite resins subjected to simulated repair procedures by using varying surface treatments and universal adhesives. MATERIAL AND METHODS Four different CAD-CAM blocks (Brilliant Crios, Lava Ultimate, Shofu Block HC, and Vita Enamic) were thermocycled (5000 times, 5/55 °C) and divided into 4 groups according to the surface treatment: control, 9% hydrofluoric acid etching, aluminum oxide airborne-particle abrasion, and tribochemical silica airborne-particle abrasion. After surface treatments, the surface roughness was measured with a nanoindenter and further examined with scanning electron microscopy. After the application of 3 different universal adhesives (Clearfil Universal Bond, Prime&Bond Universal, and Single Bond Universal), the specimens were subjected to a simulated repair process with composite resin. Bonded specimens were cut into 1 mm2 beams, and microtensile bond strength values were determined until failure at a crosshead speed of 0.5 mm/min. The bond strength data were analyzed with 3-way analysis of variance, and surface roughness data were analyzed with 2-way analysis of variance tests. Pairwise analyses were performed with the Tukey test (α=.05). RESULTS All surface treatments effectively improved repair microtensile bond strength values compared with the control (P<.05). Aluminum oxide airborne-particle abrasion had similar mean bond strength values compared with tribochemical silica airborne-particle abrasion (P>.05). Among the CAD-CAM blocks treated with hydrofluoric acid etching, Vita Enamic had the highest mean bond strength values. The highest mean microtensile bond strength repair values with the highest cohesive failure rates were found with the silane-containing universal adhesive (Single Bond Universal). CONCLUSIONS Surface treatment with aluminum oxide airborne-particle abrasion and tribochemical silica airborne-particle abrasion produced successful repair results for aged resin nanoceramics, whereas hydrofluoric acid etching can be used for aged hybrid ceramic repair. Silane-containing universal adhesive reported increased bond strength. Application of universal adhesive after surface treatment is recommended to increase repair strength.
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Affiliation(s)
- Soner Sismanoglu
- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, University of Altinbas, Istanbul, Turkey.
| | - Zuhal Yildirim-Bilmez
- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, University of Hatay Mustafa Kemal, Hatay, Turkey
| | - Aysegul Erten-Taysi
- Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Altinbas, Istanbul, Turkey
| | - Pınar Ercal
- Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Altinbas, Istanbul, Turkey
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Şişmanoğlu S, Gürcan AT, Yıldırım-Bilmez Z, Turunç-Oğuzman R, Gümüştaş B. Effect of surface treatments and universal adhesive application on the microshear bond strength of CAD/CAM materials. J Adv Prosthodont 2020; 12:22-32. [PMID: 32128083 PMCID: PMC7040451 DOI: 10.4047/jap.2020.12.1.22] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 01/13/2020] [Accepted: 02/11/2020] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The aim of this study was to evaluate the microshear bond strength (µSBS) of four computer-aided design/computer-aided manufacturing (CAD/CAM) blocks repaired with composite resin using three different surface treatment protocols. MATERIALS AND METHODS Four different CAD/CAM blocks were used in this study: (1) flexible hybrid ceramic (FHC), (2) resin nanoceramic (RNC), (c) polymer infiltrated ceramic network (PICN) and (4) feldspar ceramic (FC). All groups were further divided into four subgroups according to surface treatment: control, hydrofluoric acid etching (HF), air-borne particle abrasion with aluminum oxide (AlO), and tribochemical silica coating (TSC). After surface treatments, silane was applied to half of the specimens. Then, a silane-containing universal adhesive was applied, and specimens were repaired with a composite, Next, μSBS test was performed. Additional specimens were examined with a contact profilometer and scanning electron microscopy. The data were analyzed with ANOVA and Tukey tests. RESULTS The findings revealed that silane application yielded higher µSBS values (P<.05). All surface treatments were showed a significant increase in µSBS values compared to the control (P<.05). For FHC and RNC, the most influential treatments were AlO and TSC (P<.05). CONCLUSION Surface treatment is mandatory when the silane is not preferred, but the best bond strength values were obtained with the combination of surface treatment and silane application. HF provides improved bond strength when the ceramic content of material increases, whereas AlO and TSC gives improved bond strength when the composite content of material increases.
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Affiliation(s)
- Soner Şişmanoğlu
- Department of Restorative Dentistry, Faculty of Dentistry, Altınbaş University, Istanbul, Turkey
| | - Aliye Tuğçe Gürcan
- Department of Pediatric Dentistry, Faculty of Dentistry, Altınbaş University, Istanbul, Turkey
| | - Zuhal Yıldırım-Bilmez
- Department of Restorative Dentistry, Faculty of Dentistry, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Rana Turunç-Oğuzman
- Department of Prosthodontics, Faculty of Dentistry, Altınbaş University, Istanbul, Turkey
| | - Burak Gümüştaş
- Department of Restorative Dentistry, Faculty of Dentistry, Istanbul Medipol University, Istanbul, Turkey
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Veríssimo AH, Duarte Moura DM, de Oliveira Dal Piva AM, Bottino MA, de Fátima Dantas de Almeida L, da Fonte Porto Carreiro A, de Assunção e Souza RO. Effect of different repair methods on the bond strength of resin composite to CAD/CAM materials and microorganisms adhesion: An in situ study. J Dent 2020; 93:103266. [DOI: 10.1016/j.jdent.2019.103266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 12/06/2019] [Accepted: 12/17/2019] [Indexed: 10/25/2022] Open
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Goracci C, Özcan M, Franchi L, Di Bello G, Louca C, Vichi A. Bracket bonding to polymethylmethacrylate-based materials for computer-aided design/manufacture of temporary restorations: Influence of mechanical treatment and chemical treatment with universal adhesives. Korean J Orthod 2019; 49:404-412. [PMID: 31815108 PMCID: PMC6883210 DOI: 10.4041/kjod.2019.49.6.404] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 09/03/2019] [Accepted: 09/09/2019] [Indexed: 11/10/2022] Open
Abstract
Objective To assess shear bond strength and failure mode (Adhesive Remnant Index, ARI) of orthodontic brackets bonded to polymethylmethacrylate (PMMA) blocks for computer-aided design/manufacture (CAD/CAM) fabrication of temporary restorations, following substrate chemical or mechanical treatment. Methods Two types of PMMA blocks were tested: CAD-Temp® (VITA) and Telio® CAD (Ivoclar-Vivadent). The substrate was roughened with 320-grit sandpaper, simulating a fine-grit diamond bur. Two universal adhesives, Scotchbond Universal Adhesive (SU) and Assure Plus (AP), and a conventional adhesive, Transbond XT Primer (XTP; control), were used in combination with Transbond XT Paste to bond the brackets. Six experimental groups were formed: (1) CADTemp®/SU; (2) CAD-Temp®/AP; (3) CAD-Temp®/XTP; (4) Telio® CAD/SU; (5) Telio® CAD/AP; (6) Telio® CAD/XTP. Shear bond strength and ARI were assessed. On 1 extra block for each PMMA-based material surfaces were roughened with 180-grit sandpaper, simulating a normal/medium-grit (100 mm) diamond bur, and brackets were bonded. Shear bond strengths and ARI scores were compared with those of groups 3, 6. Results On CAD-Temp® significantly higher bracket bond strengths than on Telio® CAD were recorded. With XTP significantly lower levels of adhesion were reached than using SU or AP. Roughening with a coarser bur resulted in a significant increase in adhesion. Conclusions Bracket bonding to CAD/CAM PMMA can be promoted by grinding the substrate with a normal/medium-grit bur or by coating the intact surface with universal adhesives. With appropriate pretreatments, bracket adhesion to CAD/CAM PMMA temporary restorations can be enhanced to clinically satisfactory levels.
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Affiliation(s)
- Cecilia Goracci
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Mutlu Özcan
- Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, University of Zurich, Zurich, Switzerland
| | - Lorenzo Franchi
- Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - Giuseppe Di Bello
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Chris Louca
- University of Portsmouth Dental Academy, Portsmouth, United Kingdom
| | - Alessandro Vichi
- University of Portsmouth Dental Academy, Portsmouth, United Kingdom
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Yu H, Özcan M, Yoshida K, Cheng H, Sawase T. Bonding to industrial indirect composite blocks: A systematic review and meta-analysis. Dent Mater 2019; 36:119-134. [PMID: 31784060 DOI: 10.1016/j.dental.2019.11.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 10/07/2019] [Accepted: 11/11/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim of this systematic review and meta-analysis was to evaluate the effect of surface conditioning methods on the bond strength of industrial indirect composite blocks (ICs). METHODS Based on the PICOS strategy, the Medline via PubMed, Embase and Web of Science (ISI - Web of Knowledge) electronic databases were searched for peer-reviewed articles in both English and Chinese, with no publication year limit. In vitro studies evaluating the effects of surface conditioning on the bond strength of ICs were selected. The meta-analysis was conducted to calculate the mean difference between surface-conditioned ICs and unconditioned controls. Subgroup analysis was performed to evaluate the different surface conditioning methods, separately for polymer-infiltrated ceramic network (PICN) material and the ICs with dispersed fillers (ICDFs). Meta-analyses were performed with a random-effects model at a significance level of 0.05. RESULTS AND SIGNIFICANCE From 802 relevant studies, 25 were selected for full-text analysis. Nineteen studies were eligible for inclusion in this systematic review, whereas 9 studies were included in the meta-analysis. A manual search of the principal periodicals specific to the area resulted in no additional articles. The meta-analysis indicated a significant difference in bond strength between the surface-conditioned ICs and controls under both non-aged and aged conditions. The combination of mechanical and chemical conditioning yielded the highest bond strength of ICs. This meta-analysis suggests that chemical etching followed by a universal primer and alumina air abrasion followed by a silane coupling agent could be considered the best strategy for optimizing the bond strength of PICN materials and ICDFs under aged conditions, respectively.
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Affiliation(s)
- Hao Yu
- Department of Prosthodontics, School and Hospital of Stomatology, Fujian Medical University, Yangqiao Zhong Road 246, Fuzhou 350002, China; Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1 Chome-7-1 Sakamoto, Nagasaki, Japan.
| | - Mutlu Özcan
- University of Zurich, Center for Dental and Oral Medicine, Dental Materials Unit, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Plattenstrasse 11, CH-8032, Zurich, Switzerland.
| | - Keiichi Yoshida
- Clinic of Fixed Prosthodontics, Nagasaki University Hospital, 1 Chome-7-1 Sakamoto, Nagasaki, Japan
| | - Hui Cheng
- Department of Prosthodontics, School and Hospital of Stomatology, Fujian Medical University, Yangqiao Zhong Road 246, Fuzhou 350002, China
| | - Takashi Sawase
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1 Chome-7-1 Sakamoto, Nagasaki, Japan
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Azevedo L, Antonaya-Martin JL, Molinero-Mourelle P, Del Río-Highsmith J. Improving PMMA resin using graphene oxide for a definitive prosthodontic rehabilitation - A clinical report. J Clin Exp Dent 2019; 11:e670-e674. [PMID: 31516667 PMCID: PMC6730997 DOI: 10.4317/jced.55883] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 06/12/2019] [Indexed: 11/06/2022] Open
Abstract
The use of acrylic resins as a definitive material has shown some advantages comparing to other definitive materials. However, their poor mechanical properties remain a major drawback. In this case report, graphene oxide (GO) was incorporated into polymethyl methacrylate (PMMA) resin for a definitive maxillary rehabilitation, combined with an intraoral digital impression and a three-dimensional facial scan. After 8 months of the placement of the definitive prosthesis, no mechanical, aesthetic, or biologic complications were reported, and the soft tissues showed excellent health and stability. The incorporation of GO in PMMA resins seems to be a suitable option for prosthetic rehabilitation. However, further studies are needed to ensure rigorous scientific support of these techniques and materials.
Key words:Computer-aided design, computer-aided manufacturing, dental impression technique, dental prosthesis; graphene oxide.
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Affiliation(s)
- Luís Azevedo
- DDS. Postgraduate student, Department of Conservative Dentistry and Orofacial Prosthodontics. School of Dentistry. Complutense University of Madrid, Madrid, Spain
| | - José L Antonaya-Martin
- DDS, PhD. Clinical Assistant Professor, Department of Conservative Dentistry and Orofacial Prosthodontics. School of Dentistry. Complutense University of Madrid, Madrid, Spain
| | - Pedro Molinero-Mourelle
- DDS, MDS. PhD student, Department of Conservative Dentistry and Orofacial Prosthodontics. School of Dentistry. Complutense University of Madrid, Madrid, Spain
| | - Jaime Del Río-Highsmith
- MD, DDS, PhD. Professor, Department of Conservative Dentistry and Orofacial Prosthodontics. School of Dentistry. Complutense University of Madrid, Madrid, Spain
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Zimmermann M, Ender A, Attin T, Mehl A. Fracture load of three-unit full-contour fixed dental prostheses fabricated with subtractive and additive CAD/CAM technology. Clin Oral Investig 2019; 24:1035-1042. [DOI: 10.1007/s00784-019-03000-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 06/28/2019] [Indexed: 10/26/2022]
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Arpa C, Ceballos L, Fuentes MV, Perdigão J. Repair bond strength and nanoleakage of artificially aged CAD-CAM composite resin. J Prosthet Dent 2019; 121:523-530. [DOI: 10.1016/j.prosdent.2018.05.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 05/17/2018] [Accepted: 05/17/2018] [Indexed: 11/26/2022]
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Shinohara A, Taira Y, Sakihara M, Sawase T. Effects of three silane primers and five adhesive agents on the bond strength of composite material for a computer-aided design and manufacturing system. J Appl Oral Sci 2018; 26:e20170342. [PMID: 29742254 PMCID: PMC5933835 DOI: 10.1590/1678-7757-2017-0342] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/22/2017] [Indexed: 11/22/2022] Open
Abstract
Objective The objective of this study was to evaluate the effects of combinations of silane primers and adhesive agents on the bond strength of a composite block for a computer-aided design and manufacturing system. Material and Methods Three silane primers [Clearfil Ceramic Primer (CP), Super-Bond PZ Primer (PZ), and GC Ceramic Primer II (GP)] were used in conjunction with five adhesive agents [G-Premio Bond (P-Bond), Repair Adhe Adhesive (R-Adhesive), Super-Bond D-Liner Dual (SB-Dual), Super-Bond C&B (SB-Self), and SB-Dual without tributylborane derivative (SB-Light)]. The surface of a composite block (Gradia Block) was ground with silicon carbide paper. After treatment with a silane primer, a adhesive agent was applied to each testing specimen. The specimens were then bonded with a light-curing resin composite. After 24 h, the shear bond strength values were determined and compared using a post hoc test (α=0.05, n=8/group). We also prepared control specimens without primer (No primer) and/or without adhesive agent (No adhesive). Results PZ/SB-Dual and GP/SB-Dual presented the highest bond strength, followed by GP/P-Bond, CP/SB-Dual, CP/R-Adhesive, No primer/SB-Dual, GP/R-Adhesive, CP/P-Bond, No primer/R-Adhesive, PZ/R-Adhesive, CP/SB-Self, PZ/P-Bond, PZ/SB-Self, and GP/SB-Self in descending order of bond strength. No primer/P-Bond, No primer/SB-Self, and all specimens in the SB-Light and No adhesive groups presented the lowest bond strengths. Conclusion A dual-curing adhesive agent (SB-Dual) containing a tributylborane derivative in combination with a silane primer (GP or PZ) presents a greater bond strength between the composite block and the repairing resin composite than the comparators used in the study.
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Affiliation(s)
- Ayano Shinohara
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Yohsuke Taira
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Michino Sakihara
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Takashi Sawase
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Japan
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Tekçe N, Tuncer S, Demirci M, Kara D, Baydemir C. Microtensile Bond Strength of CAD/CAM Resin Blocks to Dual-Cure Adhesive Cement: The Effect of Different Sandblasting Procedures. J Prosthodont 2018; 28:e485-e490. [PMID: 29430807 DOI: 10.1111/jopr.12737] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2017] [Indexed: 11/27/2022] Open
Abstract
PURPOSE To investigate the effect of sandblasting powder particles on microtensile bond strength (μTBS) of dual-cure adhesive cement to CAD/CAM blocks. MATERIALS AND METHODS CAD/CAM blocks (Cerasmart, VITA, and LAVA) were cut in slabs and divided into groups: group 1, no sandblasting; group 2, sandblasted with 27-μm Al2 O3 ; group 3, sandblasted with 30-μm CoJet; group 4, sandblasted with 50-μm Al2 O3 . After sandblasting, all specimens were silanized and luted using dual-cure adhesive cement (G-CEM LinkForce). After 24 hours, bonded specimens were cut into 1 ± 0.2 mm2 sticks, and μTBS values were obtained (N = 30). Additionally, 132 CAD/CAM block sections were prepared for surface roughness testing and scanning electron microscopy (SEM) evaluations. Results were analyzed using Kruskal-Wallis One-way ANOVA and Dunn's Post Hoc Test (p < 0.05). RESULTS Group 1 exhibited significantly lower μTBS than the other groups (p < 0.05). The highest bond strength values were obtained from group 4 (p > 0.05). For LAVA, μTBS values of specimens that were sandblasted with 50-μm Al2 O3 powder were significantly higher than 30-μm-SiO2 and 27-μm Al2 O3 (p < 0.05). CONCLUSIONS The sand particles investigated (27-μm Al2 O3 , 30-μm SiO2 , or 50-μm Al2 O3 ) did not significantly affect μTBS results of CAD/CAM blocks for Cerasmart and VITA, although the results changed significantly for LAVA. The ideal bond protocol for CAD/CAM blocks is specific to the material used.
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Affiliation(s)
- Neslihan Tekçe
- Department of Restorative Dentistry, Faculty of Dentistry, University of Kocaeli, Kocaeli, Turkey
| | - Safa Tuncer
- Department of Restorative Dentistry, Faculty of Dentistry, University of Istanbul, Istanbul, Turkey
| | - Mustafa Demirci
- Department of Restorative Dentistry, Faculty of Dentistry, University of Istanbul, Istanbul, Turkey
| | - Dilan Kara
- Department of Restorative Dentistry, Faculty of Dentistry, University of Kocaeli, Kocaeli, Turkey
| | - Canan Baydemir
- Department of Biostatistics and Medical Informatics, University of Kocaeli, Kocaeli, Turkey
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Lambert H, Durand JC, Jacquot B, Fages M. Dental biomaterials for chairside CAD/CAM: State of the art. J Adv Prosthodont 2017; 9:486-495. [PMID: 29279770 PMCID: PMC5741454 DOI: 10.4047/jap.2017.9.6.486] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 04/19/2017] [Accepted: 04/20/2017] [Indexed: 12/02/2022] Open
Abstract
The wide use of chairside CAD/CAM restorations has increased the diversity of the restorative material. For the practitioner, the selection of the appropriate material is difficult amongst the variety offered by the market. Information on the characteristics of the products can be difficult to assess due to the lack of up-to-date classification and the lack of reliability of manufacturer's advertising. The purpose of this article is to structure the data on restorative materials provided by various sources in order for the practitioner to choose the product most suited to the clinical situation. The objective is to classify chairside CAD/CAM materials and to define their characteristics and indications.
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Affiliation(s)
- Hugo Lambert
- Department of Prosthodontics, Faculty of Odontology, Montpellier University, Montpellier, France
| | - Jean-Cédric Durand
- Department of Prosthodontics, Faculty of Odontology, Montpellier University, Montpellier, France.,Laboratoire de Bioingénérie et Nanosciences, EA 4203, Montpellier University, Montpellier, France
| | - Bruno Jacquot
- Preventive Department, Faculty of Odontology, Marseille University, Marseille, France
| | - Michel Fages
- Department of Prosthodontics, Faculty of Odontology, Montpellier University, Montpellier, France.,Laboratoire de Bioingénérie et Nanosciences, EA 4203, Montpellier University, Montpellier, France
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Cekic-Nagas I, Egilmez F, Ergun G, Vallittu PK, Lassila LVJ. Load-bearing capacity of novel resin-based fixed dental prosthesis materials. Dent Mater J 2017; 37:49-58. [PMID: 29081445 DOI: 10.4012/dmj.2016-367] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To evaluate the influence of different materials on the load-bearing-capacity of inlay-retained fixed-dental-prosthesis (FDP). Ten types of FDPs were evaluated (n=7/group): Group PEEK: CAD-CAM polyetheretherketone (PEEK-TechnoMed), Group RC, made of discontinuous-fiber-composite (EverX Posterior); Group FRC1, made of discontinuous-fiber-composite (EverX Posterior) with two-bundles of continuous-unidirectional fiber-reinforced-composite (FRC) (Everstick C&B); Group FRC2, made of discontinuous-fiber-composite (EverX Posterior) with two-bundles of continuous-unidirectional-FRC (Everstick C&B) covered by two-pieces of short-unidirectional-FRC (Everstick C&B) placed perpendicular to the main-framework; Group FB, CAD-CAM fiber-block (Fibra-Composite Bio-C); Group PMMA, CAD-CAM polymethyl methacrylate block (Temp basic); Group RP, resin-paste; Group FRP1, made of resin-paste (G-Fix) with two-bundles of continuous-unidirectional-FRC (Everstick C&B); Group FRP2, made of resin-paste (G-Fix) two-bundles of continuous-unidirectional-FRC covered by two-pieces of short unidirectional-FRC placed perpendicular to the main-framework and Group exp-FRC, experimental CAD-CAM FRC. The bridges were statically-loaded until fracture. Fracture modes were visually examined. ANOVA revealed that significant differences were observed between FDP-materials (p<0.05). In addition, fiber addition to the framework significantly affected load-bearing-capacity (p<0.05).
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Affiliation(s)
- Isil Cekic-Nagas
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Ferhan Egilmez
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Gulfem Ergun
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Pekka Kalevi Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Center -TCBC, Institute of Dentistry, University of Turku.,City of Turku, Welfare Division
| | - Lippo Veli Juhana Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Center -TCBC, Institute of Dentistry, University of Turku
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Subaşı MG, Alp G. Repair bond strengths of non-aged and aged resin nanoceramics. J Adv Prosthodont 2017; 9:364-370. [PMID: 29142644 PMCID: PMC5673613 DOI: 10.4047/jap.2017.9.5.364] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 06/07/2017] [Accepted: 07/04/2017] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To explore the influence of different surface conditionings on surface changes and the influence of surface treatments and aging on the bond strengths of composites to non-aged and aged resin nanoceramics. MATERIALS AND METHODS Rectangular-shaped non-aged and aged (5000 thermocycles) resin nanoceramic specimens (Lava Ultimate) (n=63, each) were divided into 3 groups according to surface treatments (untreated, air abrasion, or silica coating) (n=21). The surface roughness was measured and scanning electron microscopy was used to examine one specimen from each group. Afterwards, the specimens were repaired with a composite resin (Filtek Z550) and half were sent for aging (5000 thermocycles, n=10, each). Shear bond strengths and failure types were evaluated. Roughness and bond strength were investigated by two- and three-way analysis of variance, respectively. The correlation between the roughness and bond strength was investigated by Pearson's correlation test. RESULTS Surface-treated samples had higher roughness compared with the untreated specimens (P=.000). For the non-aged resin nanoceramic groups, aging was a significant factor for bond strength; for the aged resin nanoceramic groups, surface treatment and aging were significant factors. The failures were mostly adhesive after thermal cycling, except in the non-aged untreated group and the aged air-abraded group, which had mostly mixed failures. Roughness and bond strength were positively correlated (P=.003). CONCLUSION Surface treatment is not required for the repair of non-aged resin nanoceramic; for the repair of aged resin nanoceramic restorations, air abrasion is recommended.
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Affiliation(s)
- Meryem Gülce Subaşı
- Department of Prosthodontics, Faculty of Dentistry, Istanbul Aydın University, Istanbul, Turkey
| | - Gülce Alp
- Department of Prosthodontics, Faculty of Dentistry, Okan University, Istanbul, Turkey
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40
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Rosentritt M, Raab P, Hahnel S, Stöckle M, Preis V. In-vitro performance of CAD/CAM-fabricated implant-supported temporary crowns. Clin Oral Investig 2017; 21:2581-2587. [PMID: 28110407 DOI: 10.1007/s00784-017-2057-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 01/10/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Martin Rosentritt
- Department of Prosthetic Dentistry, University Medical Center Regensburg, 93042, Regensburg, Germany
| | - Philipp Raab
- Department of Prosthetic Dentistry, University Medical Center Regensburg, 93042, Regensburg, Germany
| | - Sebastian Hahnel
- Department of Prosthetic Dentistry, University Medical Center Regensburg, 93042, Regensburg, Germany
| | - Matthias Stöckle
- Department of Prosthetic Dentistry, University Medical Center Regensburg, 93042, Regensburg, Germany
| | - Verena Preis
- Department of Prosthetic Dentistry, University Medical Center Regensburg, 93042, Regensburg, Germany.
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Shinohara A, Taira Y, Sawase T. Effects of tributylborane-activated adhesive and two silane agents on bonding computer-aided design and manufacturing (CAD/CAM) resin composite. Odontology 2017; 105:437-442. [PMID: 28070702 DOI: 10.1007/s10266-016-0288-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 11/07/2016] [Indexed: 11/28/2022]
Abstract
The present study was conducted to evaluate the effects of an experimental adhesive agent [methyl methacrylate-tributylborane liquid (MT)] and two adhesive agents containing silane on the bonding between a resin composite block of a computer-aided design and manufacturing (CAD/CAM) system and a light-curing resin composite veneering material. The surfaces of CAD/CAM resin composite specimens were ground with silicon-carbide paper, treated with phosphoric acid, and then primed with either one of the two silane agents [Scotchbond Universal Adhesive (SC) and GC Ceramic Primer II (GC)], no adhesive control (Cont), or one of three combinations (MT/SC, MT/GC, and MT/Cont). A light-curing resin composite was veneered on the primed CAD/CAM resin composite surface. The veneered specimens were subjected to thermocycling between 4 and 60 °C for 10,000 cycles, and the shear bond strengths were determined. All data were analyzed using analysis of variance and a post hoc Tukey-Kramer HSD test (α = 0.05, n = 8). MT/SC (38.7 MPa) exhibited the highest mean bond strengths, followed by MT/GC (30.4 MPa), SC (27.9 MPa), and MT/Cont (25.7 MPa), while Cont (12.9 MPa) and GC (12.3 MPa) resulted in the lowest bond strengths. The use of MT in conjunction with a silane agent significantly improved the bond strength. Surface treatment with appropriate adhesive agents was confirmed as a prerequisite for veneering CAD/CAM resin composite restorations.
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Affiliation(s)
- Ayano Shinohara
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Yohsuke Taira
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan.
| | - Takashi Sawase
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
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Abstract
This review focuses on the relationship between the structures and properties of various polymers for different applications in dentistry.
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Affiliation(s)
- Xinyuan Xu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu
- China
| | - Libang He
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Bengao Zhu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu
- China
| | - Jiyao Li
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Jianshu Li
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu
- China
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Fatigue behavior of resin-modified monolithic CAD–CAM RNC crowns and endocrowns. Dent Mater 2016; 32:e338-e350. [DOI: 10.1016/j.dental.2016.09.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 07/19/2016] [Accepted: 09/03/2016] [Indexed: 11/18/2022]
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Güngör MB, Nemli SK, Bal BT, Ünver S, Doğan A. Effect of surface treatments on shear bond strength of resin composite bonded to CAD/CAM resin-ceramic hybrid materials. J Adv Prosthodont 2016; 8:259-66. [PMID: 27555894 PMCID: PMC4993838 DOI: 10.4047/jap.2016.8.4.259] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 04/05/2016] [Accepted: 05/30/2016] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The purpose of this study was to assess the effect of surface treatments on shear bond strength of resin composite bonded to thermocycled and non-thermocycled CAD/CAM resin-ceramic hybrid materials. MATERIALS AND METHODS 120 specimens (10×10×2 mm) from each material were divided into 12 groups according to different surface treatments in combination with thermal aging procedures. Surface treatment methods were airborne-particle abrasion (abraded with 50 micron alumina particles), dry grinding (grinded with 125 µm grain size bur), and hydrofluoric acid (9%) and silane application. According to the thermocycling procedure, the groups were assigned as non-thermocycled, thermocycled after packing composites, and thermocycled before packing composites. The average surface roughness of the non-thermocycled specimens were measured after surface treatments. After packing composites and thermocycling procedures, shear bond strength (SBS) of the specimens were tested. The results of surface roughness were statistically analyzed by 2-way Analysis of Variance (ANOVA), and SBS results were statistically analyzed by 3-way ANOVA. RESULTS Surface roughness of GC were significantly lower than that of LU and VE (P<.05). The highest surface roughness was observed for dry grinding group, followed by airborne particle abraded group (P<.05). Comparing the materials within the same surface treatment method revealed that untreated surfaces generally showed lower SBS values. The values of untreated LU specimens showed significantly different SBS values compared to those of other surface treatment groups (P<.05). CONCLUSION SBS was affected by surface treatments. Thermocycling did not have any effect on the SBS of the materials except acid and silane applied GC specimens, which were subjected to thermocycling before packing of the composite resin.
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Affiliation(s)
| | - Seçil Karakoca Nemli
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Bilge Turhan Bal
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Senem Ünver
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Aylin Doğan
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
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Duarte S, Sartori N, Phark JH. Ceramic-Reinforced Polymers: CAD/CAM Hybrid Restorative Materials. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s40496-016-0102-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Evaluation of mechanical and optical behavior of current esthetic dental restorative CAD/CAM composites. J Mech Behav Biomed Mater 2016; 55:1-11. [DOI: 10.1016/j.jmbbm.2015.10.004] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/06/2015] [Accepted: 10/12/2015] [Indexed: 11/22/2022]
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Transmission of light in the visible spectrum (400–700 nm) and blue spectrum (360–540 nm) through CAD/CAM polymers. Clin Oral Investig 2016; 20:2501-2506. [DOI: 10.1007/s00784-016-1755-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 02/12/2016] [Indexed: 11/26/2022]
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HIGASHI M, MATSUMOTO M, KAWAGUCHI A, MIURA J, MINAMINO T, KABETANI T, TAKESHIGE F, MINE A, YATANI H. Bonding effectiveness of self-adhesive and conventional-type adhesive resin cements to CAD/CAM resin blocks. Part 1: Effects of sandblasting and silanization. Dent Mater J 2016; 35:21-8. [DOI: 10.4012/dmj.2015-234] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mami HIGASHI
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Mariko MATSUMOTO
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Asuka KAWAGUCHI
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Jiro MIURA
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
| | - Takuya MINAMINO
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Tomoshige KABETANI
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Fumio TAKESHIGE
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
| | - Atsushi MINE
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Hirofumi YATANI
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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Schepke U, Meijer HJA, Vermeulen KM, Raghoebar GM, Cune MS. Clinical Bonding of Resin Nano Ceramic Restorations to Zirconia Abutments: A Case Series within a Randomized Clinical Trial. Clin Implant Dent Relat Res 2015; 18:984-992. [DOI: 10.1111/cid.12382] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Ulf Schepke
- University Medical Center Groningen; Center for Dentistry and Oral Hygiene; Department of Fixed and Removable Prosthodontics and Biomaterials; The University of Groningen; Groningen The Netherlands
| | - Henny JA Meijer
- University Medical Center Groningen; Center for Dentistry and Oral Hygiene; Department of Fixed and Removable Prosthodontics and Biomaterials; The University of Groningen; Groningen The Netherlands
| | - Karin M Vermeulen
- Medical Center Groningen; Department of Epidemiology; The University of Groningen; Groningen The Netherlands
| | - Gerry M Raghoebar
- University Medical Center Groningen, Groningen; Department of Oral and Maxillofacial Surgery; The University of Groningen; Groningen The Netherlands
| | - Marco S Cune
- University Medical Center Groningen; Center for Dentistry and Oral Hygiene; Department of Fixed and Removable Prosthodontics and Biomaterials; The University of Groningen; Groningen The Netherlands
- Department of Oral-Maxillofacial Surgery, Prosthodontics and Special Dental Care; St. Antonius Hospital; Nieuwegein The Netherlands
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Huettig F, Prutscher A, Goldammer C, Kreutzer CA, Weber H. First clinical experiences with CAD/CAM-fabricated PMMA-based fixed dental prostheses as long-term temporaries. Clin Oral Investig 2015; 20:161-8. [PMID: 25898895 DOI: 10.1007/s00784-015-1475-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 04/09/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The clinical performance of polymethylmethacrylate (PMMA)-based fixed dental prostheses (FDP) was evaluated in the indication of long-term temporaries. MATERIALS AND METHODS In the current indication of the applied machinable PMMA-based material (Vita CAD-Temp), i.e. temporary crowns and FDPs, 27 patients with compromised dentitions (uncertain dental prognosis or postponement of a removable treatment option) were recruited and 45 FDPs (3 or 4 units, 37 terminal-retained, 8 cantilevered) were inserted. Frameworks were computer-aided design (CAD)/computer-aided manufacturing (CAM)-manufactured after conventional impression taking and labside scanning of stone master casts. A resin-modified hybrid cement material (RelyX Unicem) was used for luting in a conventional protocol. Clinical follow-up was performed biannually. RESULTS Over an observation time from 2 to 26 months (median 13 months), 11 complications were found in 9 out of 45 PMMA restorations: 4 losses of retention, 5 complete fractures; two of these subsequent to a trepanation for endodontic treatment. Thereby, 3 out of 8 cantilevered FDPs had to be removed within 8 months. Thus, the statistical evaluation included FDPs with abutment at end, only. These standard design FDPs (n = 37) showed a 90.4 % survival rate with a complication-free rate of 88.3 % estimated for an observation time of 16 months. CONCLUSION Cantilevered FDPs and reconstructions on abutment teeth with markedly reduced biological prognosis or endodontic intervention yielded a high-failure rate. Terminal-retained FDPs performed clinically well in cases without compromised abutment teeth. CLINICAL RELEVANCE PMMA-based material might be used successfully for long-term temporization with 3- to 4-unit FDPs in a standard design over at least one year.
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Affiliation(s)
- Fabian Huettig
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany.
| | - Andreas Prutscher
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| | - Christoph Goldammer
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| | - Curt A Kreutzer
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| | - Heiner Weber
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
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